Linear string type optical fiber temperature monitoring device in granary

Abstract

A linear string type optical fiber temperature monitoring device in a granary comprises an optical cable and a plurality of temperature sensing mechanisms arranged on the optical cable in series at intervals, and the temperature sensing mechanisms are sleeved with protective tubes. The temperature sensing mechanism comprises a metal rod, a temperature sensing grating is bonded to the middle of the metal rod in the length direction, first grooves are formed in the two ends of the metal rod, and a fixing block is arranged in the middle of each first groove in a crossing mode. The optical cable comprises a supporting layer arranged in the first groove, a fiber core connected with the temperature sensing grating is arranged in the supporting layer, and a protective layer abutting against the end of the metal rod is arranged outside the supporting layer. A metal supporting wire is arranged between the supporting layer and the protection layer, the metal supporting wire extends out of the end of the supporting layer and is attached to the outer side of the fixing block, a temperature sensing mechanism in the protection pipe can be integrally protected through the protection pipe, and passive detection of the granary temperature is achieved; relative rotation or shaking between the optical cable and the metal rod is effectively prevented, and the accuracy of a granary temperature monitoring result is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental detection, in particular to a linear string optical fiber temperature monitoring device inside a granary. Background Art

[0002] Granaries are the main buildings for storing grain. Monitoring of their internal environment, especially temperature detection, is the key to grain storage quality.

[0003] To ensure the accuracy of monitoring data, the temperature detection of existing granaries is usually achieved with the help of temperature sensors. However, on the one hand, due to the large size of the granary, the single-point temperature measurement method using temperature sensors cannot monitor the overall temperature of the granary, resulting in incomplete monitoring results. On the other hand, since the temperature sensor requires external power supply to work, when the temperature sensor itself fails or a power supply failure occurs, the temperature monitoring work will fail, making it impossible for the temperature sensor to normally feedback the monitoring results, affecting the progress of the granary temperature monitoring work. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a linear string optical fiber temperature monitoring device inside a granary.

[0005] The technical solution of this utility model is as follows:

[0006] A linear string optical fiber temperature monitoring device for inside a granary includes an optical cable, and can be communicatively connected to a detection host through the optical cable. A plurality of temperature sensing mechanisms are connected in series in the gaps on the optical cable, and a protective tube is provided on the outside of the temperature sensing mechanism. Through the plurality of temperature sensing mechanisms of the monitoring device (the above-mentioned linear string optical fiber temperature monitoring device for inside a granary), the overall temperature of the granary can be monitored.

[0007] As the core technical concept of the utility model, the temperature sensing mechanism includes a metal rod, a temperature-sensitive grating is bonded to the middle part of the metal rod along its length direction, and first grooves are provided at both ends, and a fixed block is spanned in the middle of the first groove; the optical cable includes a supporting layer arranged in the first groove, a fiber core connected to the temperature-sensitive grating is provided inside the supporting layer, and a protective layer in contact with the end of the metal rod is provided outside; a metal supporting wire is provided between the supporting layer and the protective layer, which extends out of the end of the supporting layer and fits with the outer side of the fixed block. On the basis of the above structure, the protective tube can provide an overall protection for the temperature sensing mechanism inside it, and the temperature monitoring is completed by the optical cable in conjunction with the temperature-sensitive optical fiber, thereby realizing passive detection of the granary temperature. The provision of the metal supporting wire effectively prevents relative rotation or shaking between the optical cable and the metal rod when the protective tube is laid and glue is injected after the temperature sensing mechanism is connected to the optical cable, thereby ensuring the stability of the connection between the fiber core and the temperature-sensitive grating, thereby effectively ensuring the accuracy of the granary temperature monitoring results.

[0008] As a preferred embodiment of the linear string optical fiber temperature monitoring device inside a granary as described above, in order to further ensure the connection strength between the optical cable and the metal rod, two metal support wires are provided and respectively fit with two sides of the fixing block.

[0009] In the linear string optical fiber temperature monitoring device inside a granary as described above, in order to enable the protective tube to better cooperate with the metal rod to complete the protection work of the temperature sensing mechanism, a support block in contact with the inner wall of the protective tube is also provided across the first groove located on the inner side of the fixed block.

[0010] As a preferred implementation, in order to ensure the stability of the cooperation between the metal rod and the protective tube, the side of the support block in contact with the inner wall of the protective tube is a first arc-shaped end surface.

[0011] In order to make the cooperation between the optical cable and the metal rod more secure, a gap for glue injection is reserved between the fixing block and the supporting block. Through the subsequent glue injection work, the optical cable and the metal rod can be better combined into one, further ensuring the stability of the connection between the optical cable and the metal rod.

[0012] As a further preference, one side of the metal rod is a flat end surface, and the first grooves are arranged at both ends of the flat end surface; the side of the metal rod away from the flat end surface is a second arc-shaped end surface that fits the inner wall of the protective tube, further ensuring the stability of the cooperation between the metal rod and the protective tube.

[0013] In order to make the temperature sensitive grating cooperate better with the metal rod and enable the detection device to better feedback the temperature value through the viscous expansion coefficient of the metal rod, a second groove is provided in the middle of the flat end surface, and its two ends are respectively connected to the two first grooves, and the temperature sensitive grating is arranged in the second groove.

[0014] The linear string optical fiber temperature monitoring device inside a granary as described above is made of stainless steel to ensure the protective strength of the protective tube, prevent erosion of the protective tube when the granary environment is humid, and ensure the thermal conductivity of the protective tube.

[0015] The beneficial effects of the utility model are as follows: the utility model is a linear string optical fiber temperature monitoring device inside a granary, which can provide an overall protection for the temperature sensing mechanism inside the granary through a protective tube, and realizes passive detection of the granary temperature by completing temperature monitoring through an optical cable in conjunction with a temperature-sensitive optical fiber. The provision of a metal support wire effectively prevents relative rotation or shaking between the optical cable and the metal rod when the protective tube is laid and glue is injected after the temperature sensing mechanism is connected to the optical cable, thereby ensuring the stability of the connection between the fiber core and the temperature-sensitive grating, and thereby effectively ensuring the accuracy of the granary temperature monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is a structural schematic diagram of the detection device in the embodiment;

[0019] Figure 2 This is a schematic diagram of the connection structure between the optical cable and the temperature sensing mechanism in the embodiment;

[0020] Figure 3 A schematic diagram of the structure of the optical cable in the embodiment;

[0021] Figure 4 It is a schematic diagram of the structure of the metal rod in the embodiment;

[0022] The components represented by the reference numerals in the figure are:

[0023] 1. Optical cable; 11. Protective layer; 12. Support layer; 13. Fiber core; 14. Metal support wire; 2. Temperature sensing mechanism; 21. Metal rod; 211. Flat end surface; 212. First groove; 213. Second groove; 214. Fixed block; 215. Support block; 3. Protective tube. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0025] Example

[0026] This embodiment provides a linear string optical fiber temperature monitoring device inside a granary, see Figure 1and Figure 2 , including an optical cable 1, and the optical cable 1 can be used to communicate with the detection host. A plurality of temperature sensing mechanisms 2 are connected in series in the gaps on the optical cable 1. The outer sheath of the temperature sensing mechanism 2 is provided with a protective tube 3. The monitoring device (the above-mentioned linear string optical fiber temperature monitoring device inside the granary) has a plurality of temperature sensing mechanisms 2, which can complete the monitoring of the overall temperature of the granary. The structure of the monitoring device is described in detail below.

[0027] In this embodiment, as the core technical concept of the utility model, combining 3 and Figure 4 The temperature sensing mechanism 2 includes a metal rod 21, a temperature sensing grating (not shown) is bonded to the middle of the metal rod 21 along its length direction, and first grooves 212 are provided at both ends of the metal rod 21, and a fixing block 214 is provided across the middle of the first groove 212; the optical cable 1 includes a supporting layer 12 provided in the first groove 212, and the supporting layer 12 is pressed and fixed in the first groove 212 by the fixing block 214, and a fiber core 13 connected to the temperature sensing grating is provided inside the supporting layer 12, and a protective layer 11 that contacts the end of the metal rod 21 is provided outside; a metal supporting wire 14 is provided between the supporting layer 12 and the protective layer 11, and the ... The end of the supporting layer 12 is extended out and fits with the outer side of the fixed block 214. On the basis of the above structure, the protective tube 3 can provide an overall protection for the temperature sensing mechanism 2 inside it, and the temperature monitoring is completed by the optical cable 1 in cooperation with the temperature-sensitive optical fiber, thereby realizing passive detection of the granary temperature. The setting of the metal supporting wire 14 effectively prevents the relative rotation or shaking between the optical cable 1 and the metal rod 21 when the protective tube 3 is laid and the glue is injected after the temperature sensing mechanism 2 is connected to the optical cable 1, thereby ensuring the stability of the connection between the fiber core 13 and the temperature-sensitive grating, thereby effectively ensuring the accuracy of the granary temperature monitoring results.

[0028] As a preferred implementation, in order to further ensure the connection strength between the optical cable 1 and the metal rod 21 , two metal support wires 14 are provided and are respectively fitted to two sides of the fixing block 214 .

[0029] Specifically speaking about the structure of the metal rod 21 , in order to enable the protective tube 3 to better cooperate with the metal rod 21 to complete the protection work of the temperature sensing mechanism 2 , a support block 215 in contact with the inner wall of the protective tube 3 is also provided on the first groove 212 located on the inner side of the fixing block 214 .

[0030] As a preferred implementation, in order to ensure the stability of the cooperation between the metal rod 21 and the protective tube 3, the side of the support block 215 in contact with the inner wall of the protective tube 3 is a first arc-shaped end surface.

[0031] As a further preference, in order to make the fit between the optical cable 1 and the metal rod 21 more secure, a gap for glue injection is reserved between the fixing block 214 and the supporting block 215. Through the subsequent glue injection work, the optical cable 1 and the metal rod 21 can be better combined into one, further ensuring the stability of the connection between the optical cable 1 and the metal rod 21.

[0032] More preferably, one side of the metal rod 21 is a flat end surface 211, the first grooves 212 are arranged at both ends of the flat end surface 211, and respectively penetrate the two ends of the metal rod 21, and the side of the metal rod 21 away from the flat end surface 211 is a second arc-shaped end surface that fits with the inner wall of the protective tube 3, which further ensures the stability of the cooperation between the metal rod 21 and the protective tube 3.

[0033] On the basis of the above structure, in order to enable the temperature sensitive grating to better cooperate with the metal rod 21 and enable the detection device to better feedback the temperature value through the viscous expansion coefficient of the metal rod 21, a second groove 213 is provided in the middle of the flat end surface 211, and both ends are respectively connected to the two first grooves 212, and the temperature sensitive grating is arranged in the second groove 213.

[0034] In this embodiment, in order to ensure the protective strength of the protective tube 3, prevent the protective tube 3 from being corroded when the granary environment is humid, and ensure the thermal conductivity of the protective tube 3, the protective tube 3 is made of stainless steel.

Claims

1. A linear string optical fiber temperature monitoring device inside a granary, characterized in that: It comprises an optical cable (1) and can be connected to a detection host through the optical cable (1), a plurality of temperature sensing mechanisms (2) are connected in series at intervals on the optical cable (1), and a protective tube (3) is provided on the outside of the temperature sensing mechanism (2); The temperature sensing mechanism (2) comprises a metal rod (21), a temperature sensing grating being bonded to the middle of the metal rod along its length direction, and first grooves (212) being provided at both ends, and a fixing block (214) being provided across the middle of the first groove (212); The optical cable (1) comprises a support layer (12) arranged in a first groove (212), wherein a fiber core (13) connected to a temperature-sensitive grating is arranged inside the support layer (12), and a protective layer (11) is arranged outside the support layer (12) to abut against an end of a metal rod (21); A metal support wire (14) is provided between the support layer (12) and the protective layer (11), and extends out of the end of the support layer (12) and fits with the outer side of the fixing block (214).

2. According to claim 1, a linear series optical fiber temperature monitoring device inside a granary is characterized in that: The metal support wires (14) are provided in two pieces and are respectively fitted to two sides of the fixing block (214).

3. A linear series optical fiber temperature monitoring device inside a granary according to claim 1 or 2, characterized in that: A support block (215) in contact with the inner wall of the protective tube (3) is also straddled on the first groove (212) located on the inner side of the fixing block (214).

4. A linear series optical fiber temperature monitoring device inside a granary according to claim 3, characterized in that: The side of the support block (215) that contacts the inner wall of the protective tube (3) is a first arc-shaped end surface.

5. According to claim 3, a linear series optical fiber temperature monitoring device inside a granary is characterized in that: A gap for glue injection is reserved between the fixing block (214) and the supporting block (215).

6. The linear series optical fiber temperature monitoring device inside a granary according to claim 3 is characterized in that: One side of the metal rod (21) is a flat end surface (211), and the first grooves (212) are arranged at both ends of the flat end surface (211); The side of the metal rod (21) facing away from the flat end surface (211) is a second arc-shaped end surface that fits the inner wall of the protective tube (3).

7. A linear series optical fiber temperature monitoring device inside a granary according to claim 6, characterized in that: A second groove (213) is provided in the middle of the flat end surface (211), the two ends of which are respectively connected to the two first grooves (212), and the temperature-sensitive grating is arranged in the second groove (213).

8. A linear series optical fiber temperature monitoring device inside a granary according to claim 1 or 2, characterized in that: The protective tube (3) is made of stainless steel.

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